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Journal of Optometry

Giancarlo Montani, Paul J Murphy, Sudi Patel
PURPOSE: To investigate changes in higher order ocular aberrations (HOA) induced by the administration of 0.15% sodium hyaluronate tear enhancer (TE) and meibomian gland expression (ME) on the tear film of normal subjects. METHODS: HOA values were obtained from the corneal surface (CS) and whole eye (WE), using a corneal topographer and Shack-Hartmann aberrometer, from both eyes of 50 subjects (25 females, mean age±sd 32.5±11.0 years, and 25 males, 33.88±11.2 years) for two pupil sizes (3 and 6mm) in a dark environment...
April 23, 2018: Journal of Optometry
Catriona Barrett, James Loughman
PURPOSE: To investigate current diagnostic equipment availability and usage for glaucoma case-finding within community optometric practice, and to explore optometrists' attitudes towards an enhanced scope of clinical practice. METHODS: An anonymous survey was developed, validated, and distributed to all optometrists in Ireland. RESULTS: 199 optometrists (27% of registrants) responded to the survey. 87% had access to the traditional triad of tests necessary to conduct adequate glaucoma case finding...
April 9, 2018: Journal of Optometry
Alberto Domínguez-Vicent, Daniel Monsálvez-Romín, José J Esteve-Taboada, Robert Montés-Micó, Teresa Ferrer-Blasco
PURPOSE: To compare changes in the ciliary muscle area at different sectors between pre-presbyopic and presbyopic eyes during accommodation by means of an anterior segment optical coherence tomographer (OCT). METHODS: The anterior ciliary muscle area was measured in 20 healthy and phakic pre-presbyopic eyes, whose mean age was 23.3±4.4 years, and in 20 healthy and phakic presbyopic eyes, whose mean age was 46.5±5.2 years. The relative change in the cross-sectional area of the ciliary muscle was measured at the nasal, inferior, and temporal sectors between 0 and -3 D of vergence, in -1 D step...
April 4, 2018: Journal of Optometry
Paula Bernal-Molina, José J Esteve-Taboada, Teresa Ferrer-Blasco, Robert Montés-Micó
PURPOSE: To assess the changes in the accommodative response of the eye while reading a text under different contrast polarity conditions: black letters on white background (BoW condition) and white letters on black background (WoB condition). METHODS: Eighteen subjects with ages ranging from 21 to 41 years participated in this experimental study. The accommodative response (AR) of the eye while reading a text with BoW or WoB contrast polarity was obtained objectively with an adaptive optics system that corrected all aberrations but subject's own...
April 4, 2018: Journal of Optometry
Manuel Rodríguez-Vallejo, David P Piñero, Joaquín Fernández
No abstract text is available yet for this article.
April 4, 2018: Journal of Optometry
Michael J Doughty
PURPOSE: To evaluate whether visual target character and visibility affects spontaneous eye blink rate (SEBR) in primary eye gaze and silence. METHODS: Video recordings were made of young healthy adults who were either emmetropic (n=32) or who wore spectacles for refractive error (range -4.75D and +4.50D (n=31). Emmetropes had 5min recordings made whilst seated and looking towards a distant whiteboard. For spectacle wearers, recordings were made whilst looking towards the whiteboard with a 35mm sized cross, and repeated after spectacle removal...
April 4, 2018: Journal of Optometry
Hassan Hashemi, Amir Asharlous, Abbasali Yekta, Hadi Ostadimoghaddam, Masumeh Mohebi, Mohamadreza Aghamirsalim, Mehdi Khabazkhoob
PURPOSE: To evaluate the relationship patterns between astigmatism axes of fellow eyes (rule similarity and symmetry) and to determine the prevalence of each pattern in the studied population. METHODS: This population-based study was conducted in 2015 in Iran. All participants had tests for visual acuity, objective refraction, subjective refraction (if cooperative), and assessment of eye health at the slit-lamp. Axis symmetry was based on two different patterns: direct (equal axes) and mirror (mirror image symmetry) or enantiomorphism...
April 3, 2018: Journal of Optometry
Antonio J Del Águila-Carrasco, Francisco Lara, Paula Bernal-Molina, Resurrección Riquelme-Nicolás, Iván Marín-Franch, José J Esteve-Taboada, Robert Montés-Micó, Philip B Kruger, Norberto López-Gil
PURPOSE: We tested the hypothesis that changes in accommodation after instillation of Phenylephrine Hydrochloride (PHCl) observed in some studies could be caused by changes in optics. METHODS: We performed two experiments to test the effects of PHCl on static and on dynamic accommodation in 8 and 6 subjects, respectively. Objective wavefront measurements were recorded of the static accommodation response to a stimulus at different distances or dynamic accommodation response to a sinusoidally moving stimulus (between 1 and 3 D of accommodative demand at 0...
March 27, 2018: Journal of Optometry
Barry Tannen, Kalynn Good, Kenneth J Ciuffreda, Kelsey J Moore
PURPOSE: To assess the prevalence of esophoria at near in concussed patients in a neuro-optometric private practice setting. METHODS: A retrospective analysis was performed involving a chart review in a neuro-optometric, private practice setting of consecutive patients with a medical diagnosis of concussion from January 1st 2016 to December 31st 2016. A total of 71 patients were included in the analysis. All received a comprehensive vision examination, with a near vision emphasis...
March 27, 2018: Journal of Optometry
Vivek Labhishetty, William R Bobier, Vasudevan Lakshminarayanan
BACKGROUND: Accommodation is often recorded at a low sampling rate using devices such as autorefractors that are designed to measure the static refractive error. It is therefore important to determine if that resolution is sufficient to accurately measure the dynamic properties of accommodation. The current study provides both theoretical and empirical evidence on the ideal sampling rate necessary to measure a dynamic response. METHODS: Accommodative and disaccommodative step stimuli ranging from 1-3D (1D steps) were presented using a Badal optical system...
March 23, 2018: Journal of Optometry
Juan F Zapata-Díaz, Hema Radhakrishnan, W Neil Charman, Norberto López-Gil
PURPOSE: To develop a flexible model of the average eye that incorporates changes with age and accommodation in all optical parameters, including entrance pupil diameter, under photopic, natural, environmental conditions. METHODS: We collated retrospective in vivo measurements of all optical parameters, including entrance pupil diameter. Ray-tracing was used to calculate the wavefront aberrations of the eye model as a function of age, stimulus vergence and pupil diameter...
March 21, 2018: Journal of Optometry
Elizabeth L Irving, Carolyn M Machan, Sharon Lam, Patricia K Hrynchak, Linda Lillakas
PURPOSE: To investigate mean ocular refraction (MOR) and astigmatism, over the human age range and compare severity of refractive error to earlier studies from clinical populations having large age ranges. METHODS: For this descriptive study patient age, refractive error and history of surgery affecting refraction were abstracted from the Waterloo Eye Study database (WatES). Average MOR, standard deviation of MOR and astigmatism were assessed in relation to age...
March 19, 2018: Journal of Optometry
Azam Ghazanfari, Ebrahim Jafarzadehpour, Samira Heydarian, Kiumars Nowroozpoor Dailami, Hosein Karami
PURPOSE: To compare contrast sensitivity (CS) in multi-transfused β-thalassemia patients who received deferoxamine with those who received Osveral. METHODS: In this cross sectional study a total of 60 β-thalassemia patients (30 used deferoxamine and 30 used deferasirox) were regarded as case group and 30 age and sex matched healthy subjects were selected as control group. All subjects had a set of examinations including refraction, visual acuity, Biomicroscopy, ophthalmoscopy and CS...
March 10, 2018: Journal of Optometry
Ariela Gordon-Shaag, David P Piñero, Cyril Kahloun, David Markov, Tzadok Parnes, Liat Gantz, Einat Shneor
BACKGROUND: The VX120 (Visionix Luneau, France) is a novel multi-diagnostic platform that combines Hartmann-Shack based autorefraction, Placido-disk based corneal-topography and anterior segment measurements made with a stationary-Scheimpflug camera. We investigate the agreement between different parameters measured by the VX120 with accepted or gold-standard techniques to test if they are interchangeable, as well as to evaluate the repeatability and reproducibility. METHODS: The right-eyes of healthy subjects were included in the study...
March 8, 2018: Journal of Optometry
Iván Marín-Franch
No abstract text is available yet for this article.
April 2018: Journal of Optometry
Maddalena De Bernardo, Nicola Rosa
No abstract text is available yet for this article.
April 2018: Journal of Optometry
Neera Kapoor, Kenneth Joseph Ciuffreda
PURPOSE: This pilot study sought to determine the efficacy of using the Developmental Eye Movement (DEM) test in the adult, acquired brain injury (ABI) population to quantify clinically the effects of controlled, laboratory-performed, oculomotor-based vision therapy/vision rehabilitation. METHODS: Nine adult subjects with mild traumatic brain injury (mTBI) and five with stroke were assessed before and after an eight-week, computer-based, versional oculomotor (fixation, saccades, pursuit, and simulated reading) training program (9...
April 2018: Journal of Optometry
Ashley M Speilburg, Bruce Teitelbaum, Yi Pang, Shaun Ittiara
PURPOSE: Diabetic retinopathy is the leading cause of blindness among working-age adults in most developed countries. It affects eyes bilaterally and is generally believed to be symmetrical, yet there are few studies evaluating the symmetry of diabetic retinopathy. The purpose of the present study was to evaluate the symmetry of the amount of peripheral retinal ischemia in patients with diabetic retinopathy. METHODS: Ultra-widefield fluorescein angiography images were obtained on both eyes of 54 subjects, mean age 56...
January 12, 2018: Journal of Optometry
Charles W Mcmonnies
PURPOSE: To examine the factors which contribute to tear stability and the validity and reliability of methods used for assessing tear break up time which is a core part of an examination of tear stability in dry eye patients. METHODS: A review of publications which are relevant to tear stability and its assessment. RESULTS: Tear break up time may be more invasive than intended if difficulty avoiding blinking during assessment results in reflex tearing...
January 11, 2018: Journal of Optometry
David P Piñero
No abstract text is available yet for this article.
January 2018: Journal of Optometry
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